CN205347988U - Assembled of taking grille -type to connect makes up bridge deck structure - Google Patents

Abstract

The utility model discloses an assembled of taking grille -type to connect makes up bridge deck structure, combination bridge deck structure includes that two block at least steel sheets - fibre concrete combination formula component assembly forms, steel sheet - fibre concrete combination formula component includes the steel bridge panel that is located the lower part and pours the prefabricated fibre concrete spare on the steel bridge panel, two block adjacent steel sheets - the butt joint region of fibre concrete combination formula component is equipped with grille -type and connects, grille -type connects including cast -in -place fibre concrete spare and concreties the grid reinforcing member on the steel bridge panel, the grid reinforcing member is by being located dock the prefabricated fibre concrete spare of regional both sides and be located the complete cladding of cast -in -place fibre concrete spare in the butt joint region, prefabricated fibre concrete spare and cast -in -place fibre concrete spare pass through the holistic fibre concrete layer of constitution is connected to the grid reinforcing member, adjacent two the fixed holistic steel bridge panel layer that forms is connected to the steel bridge panel.

Description

An Assembled Composite Bridge Deck Structure with Grid Joints

technical field

The utility model relates to a building detail of a bridge structure and its construction, in particular to an assembled composite bridge deck structure.

Background technique

The existing steel bridge cement concrete deck pavement adopts the integral cast-in-place construction method, as shown in Figure 1, after the construction is completed, a cast-in-place concrete pavement 7 is formed on the steel bridge deck Reinforcing steel bars 15 are prefabricated in the concrete pavement layer 7 . Most of the existing conventional bridge deck cement concrete pavement adopts the cast-in-place construction method. Because the bridge deck concrete is easy to shrink and crack, the existing cast-in-place construction technology cannot guarantee the construction quality, and the maintenance of large-scale cast-in-place concrete is very difficult. The strength of concrete will be greatly reduced due to insufficient maintenance, which will greatly reduce the service life of the bridge deck pavement. In addition, due to the long construction time of cast-in-place and the late traffic opening time, this will further affect the local traffic conditions and economic development.

With the development and progress of material science, ultra-high performance fiber concrete has appeared in the field of bridge construction. Although the bridge deck structure obtained after fiber concrete construction has obvious advantages, the existing bridge deck pavement The overall cast-in-place construction method, there are many problems in pouring fiber concrete on the bridge deck through the integral cast-in-place construction method: for example, the construction period is long, the production efficiency is low, and the production cost is difficult to control; Steam curing of slabs is difficult; both steel bars and fiber concrete are vulnerable to the adverse effects of the environment, and are highly sensitive to the environment, especially the presence of a large number of chloride ions in the air in marine environments, which affects the corrosion resistance of steel bars and the durability of cast-in-place concrete It is a great threat, and the performance of the fiber concrete layer after pouring is difficult to be guaranteed.

In addition, prefabricated steel-fiber-reinforced concrete composite bridge deck structures have also begun to appear in the prior art, but the existing prefabricated composite deck structures have excessive local stress at the joints, cracks in the pavement layer, and bridge deck structure The durability and anti-fatigue performance are difficult to meet the use requirements and other defects.

Utility model content

The purpose of this utility model is to solve the above-mentioned technical problems by proposing an assembly-type construction method that can improve the local tensile strength and stiffness of the combined bridge deck structure, reduce the joint stress of the assembly-type structure, and effectively prevent cracks in the pavement layer. Prefabricated steel-fiber-reinforced concrete composite deck structure with grid-type joints with good durability and fatigue resistance.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: an assembled composite deck structure with grid joints, the composite bridge deck structure is composed of at least two steel plate-fiber concrete composite components assembled; The steel plate-fiber concrete composite member includes a steel bridge deck at the lower part and a prefabricated fiber concrete piece poured on the steel bridge deck; the butt joint area of two adjacent steel plate-fiber concrete composite members is provided with a grid type joint; the grid-type joint includes cast-in-place fiber concrete parts and grid reinforcement members consolidated on the steel bridge deck; the grid reinforcement members are composed of prefabricated fiber concrete The cast-in-place fiber concrete parts in the docking area are completely covered, and the prefabricated fiber concrete parts and the cast-in-place fiber concrete parts are connected to form an integral fiber concrete layer through the grid reinforcement member; the two adjacent steel bridges The panels are connected and fixed to form an integral steel bridge deck layer; at least one of the two ends of each steel bridge deck is fixed with a grid reinforcement member, and the grid reinforcement member is embedded with the steel plate-fiber The prefabricated fiber concrete parts in the concrete composite components are connected, and the grid reinforcement member is connected with the cast-in-place fiber concrete parts in an embedded way along the other side of the bridge longitudinal direction.

In the present invention, the fiber concrete joint between the prefabricated fiber concrete part and the cast-in-place fiber concrete part is arranged above the grid reinforcement member.

In the utility model, the steel plate-fiber concrete composite member is provided with a first longitudinal reinforcing bar extending longitudinally along the bridge and penetrating through the steel bridge deck and a second longitudinal reinforcing bar connected between the grid reinforcing members , connecting steel bars are provided in the butt joint areas of two adjacent steel plate-fiber concrete composite members; the first longitudinal reinforcement bars are butt-connected by connecting steel bars.

In the present utility model, the grid structure includes vertical and horizontal steel bars cross-connected to each other; the horizontal steel bars are fixed on the longitudinal steel bars The upper side or the horizontal bridge steel rod is pierced on the longitudinal bridge steel rod and the horizontal bridge steel rod is fixedly connected with the longitudinal bridge steel rod.

In the present invention, a wear layer is covered above the fiber concrete layer; a shearing structure is arranged at the joint surface of the steel bridge deck layer and the fiber concrete layer.

In the utility model, the prefabricated fiber concrete parts and cast-in-place fiber concrete parts are mainly casted by one or several kinds of active powder concrete, ultra-high performance fiber reinforced concrete and grouting fiber concrete.

In the present utility model, the surface of the steel bridge deck and the grid reinforcement member is coated with an anti-corrosion agent.

Compared with the prior art, the utility model has the advantages of:

1. The assembled steel-fiber concrete composite bridge deck structure of the present utility model is a composite bridge deck structure that can be effectively applied to the assembled construction method. The composite bridge deck structure of the present utility model fully utilizes the advantages of the assembled bridge construction method. Advantages, not only can effectively shorten the construction period, reduce production costs, improve project quality, but also reduce the possible adverse effects of the construction environment, the installation of components is simple, and the construction is convenient.

2. The prefabricated steel-fiber concrete composite deck structure of the present utility model is mainly composed of the fiber concrete layer and the steel bridge deck layer, and the prefabricated construction method can be adopted. The composite bridge deck structure of the present utility model especially adopts lattice Grid-type joints, the grid-type joints especially include vertical and horizontal steel rods. This special structural design reduces the stress of the steel bridge deck and its longitudinal and horizontal ribs at the joint position under the wheel load of the vehicle, and greatly strengthens the joints. The anti-slip ability between the fiber concrete and the steel bridge deck, and has the effect of "reinforcement" and "cuffing" on the fiber concrete, which greatly reduces the risk of cracking of the fiber concrete joints.

In general, the utility model makes the advantages of the prefabricated construction technology fully and effectively by setting the grid-type joints in the prefabricated steel-fiber concrete composite deck structure (especially the orthotropic steel deck composite structure). This not only facilitates construction operations and improves construction efficiency, but also helps ensure the construction quality of composite bridge deck structures. Judging from the actual application effect, the combined deck structure of the utility model does not change the overall thickness of the bridge deck structure, greatly enhances the interlayer slip resistance between the fiber concrete and the steel bridge deck at the joint, and has an effect on the fiber concrete. The functions of "reinforcement" and "cuffing" can effectively improve the local strength and stiffness of the composite bridge deck structure, reduce the stress level at the joints, and effectively prevent the occurrence of cracks at the joints. It has great practical value and good economic benefits, especially has broad application prospects in the construction of large and extra large steel bridges.

Description of drawings

Figure 1 is a schematic diagram (cross-sectional view) of the overall rigid deck structure of a conventional orthotropic steel box girder in the prior art;

Fig. 2 is a schematic perspective view of the overhead direction of the assembled steel-fiber concrete composite bridge deck structure in the embodiment of the utility model (wearing layer is omitted in the figure);

Fig. 3 is a cross-sectional view at A-A in Fig. 2 (Fig. 3 restores the wearing layer compared to Fig. 2);

Figure 4 is a cross-sectional view at A1-A1 in Figure 2 (Figure 4 restores the wear layer compared to Figure 2);

Fig. 5 is a schematic diagram of the state of the combined bridge deck structure in the combined splicing construction step in the embodiment of the present invention (the state when the cast-in-place fiber concrete parts are not poured);

Fig. 6 is a schematic diagram of the internal structure of the assembled composite bridge deck structure with grid joints in the embodiment of the present invention.

detailed description

In order to illustrate the technical solution of the utility model more clearly, the technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the following descriptions are only some embodiments of the utility model. For those skilled in the art, other embodiments can also be obtained according to these embodiments without paying creative efforts.

Referring to Figures 1 to 6, an assembled composite deck structure with grid joints, the composite bridge deck structure includes at least two steel plate-fiber concrete composite components 14 assembled; steel plate-fiber concrete composite components 14 It includes the steel bridge deck 13 at the lower part and the prefabricated fiber concrete part 4 poured on the steel bridge deck 13; the butt joint area of two adjacent steel plate-fiber concrete composite members 14 is provided with a grid joint; the grid joint includes The cast-in-place fiber concrete part 3 and the grid reinforcement member 5 consolidated on the steel bridge deck 13; the grid reinforcement member 5 consists of the prefabricated fiber concrete part 4 located on both sides of the docking area and the cast-in-place fiber concrete part located in the docking area 3 is completely covered, the prefabricated fiber concrete part 4 and the cast-in-place fiber concrete part 3 are connected through the grid reinforcement member 5 to form an integral fiber concrete layer 2; two adjacent steel bridge decks 13 are connected and fixed to form an integral steel bridge deck layer 1. At least one of the two ends of each steel bridge deck 13 is fixed with a grid reinforcement member 5, and the grid reinforcement member 5 is embedded with the prefabricated steel plate-fiber concrete composite member 14 on one side along the longitudinal direction of the bridge. The fiber concrete parts 4 are connected, and the grid reinforcement member 5 is connected with the cast-in-place fiber concrete parts 3 in an embedded way along the other side of the bridge longitudinal direction.

Specifically, the prefabricated composite bridge deck structure with grid joints is mainly composed of multiple steel plate-fiber concrete composite members 14 that are sequentially connected and assembled along the longitudinal direction of the bridge (only the partial structures of two adjacent pieces are shown in the figure) , the steel plate-fiber concrete composite member 14 includes the steel bridge deck 13 at the lower part and the prefabricated fiber concrete part 4 poured on the steel bridge deck 13, the butt joint area of two adjacent steel plate-fiber concrete composite members 14 is provided with lattice grid connector. The grid joint includes cast-in-place fiber concrete parts 3 and grid reinforcement members 5 fixed on the steel bridge deck 13. The grid reinforcement members 5 are composed of prefabricated fiber concrete The cast-in-place fiber concrete part 3 is completely covered (that is, the grid reinforcement member 5 is pre-embedded in the fiber concrete layer 2). Between the grid reinforcement member 5 and the prefabricated fiber concrete part 4 and between the grid reinforcement member 5 and the cast-in-place fiber concrete part 3 are connected into an integral fiber concrete layer 2 in a "embedded" manner, and the adjacent steel bridge deck 13 The integral steel bridge deck layer 1 is formed by welding at the steel plate seams 9 .

The steel plate-fiber concrete composite member 14 includes a prefabricated structure and a cast-in-place structure. The steel bridge deck 13 is evenly divided into four areas in turn, of which the middle two are prefabricated areas, and the two ends are cast-in-place areas. The prefabricated area There is a grid reinforcement member 5 between the cast-in-place area and the grid reinforcement member 5 is symmetrically arranged in the prefabricated area and the cast-in-place area, and fiber concrete is poured in the middle two prefabricated areas to form a prefabricated fiber concrete piece 4 to form a prefabricated structure. Half of the grid reinforcement member 5 is pre-buried, and the other half of the grid reinforcement member 5 is exposed in the two cast-in-place areas at the ends. The two cast-in-place areas at both ends of the steel bridge deck 13 are used to form a cast-in-place structure. During construction, two adjacent steel plate-fiber concrete composite members 14 are first welded and connected at steel plate joints 9 through the steel bridge deck 13, and the adjacent two cast-in-place areas form a docking area, and then pour fiber reinforced concrete into the docking area. Concrete forms cast-in-place fiber concrete parts 3 to form a cast-in-place structure, so that adjacent steel plate-fiber concrete composite members 14 are connected and fixed to form an assembled composite bridge deck structure with grid joints.

In a specific embodiment, since the fiber concrete structure in the docking area is cast on-site later, a fiber concrete joint 11 will be formed at the connection between the prefabricated fiber concrete part 4 and the cast-in-place fiber concrete part 3, and this fiber concrete The seam 11 is the weak point of stress. For this reason, the fiber concrete joint 11 between the prefabricated fiber concrete part 4 and the cast-in-place fiber concrete part 3 is positioned above the grid reinforcement member 5 . The local strength and stiffness of the fiber concrete joint 11 in the bridge deck structure can be greatly improved through the grid reinforcement member 5, the stress level at the fiber concrete joint 11 is greatly reduced, and the structural stability of the bridge deck structure is improved.

In a specific embodiment, since the grid reinforcement members 5 in the steel plate-fiber concrete composite member 14 and between the steel plate-fiber concrete composite members 14 exist independently, there is no integrally connected interior along the longitudinal direction of the bridge. Strengthen the member. To this end, the steel plate-fiber concrete composite member 14 is configured with a first longitudinal reinforcing bar 6 extending longitudinally along the bridge and penetrating through the steel bridge deck 13 and a second longitudinal reinforcing bar 6a connected between the grid reinforcing members 5, correspondingly A connecting steel bar 10 is provided in the butt joint area adjacent to the two steel plate-fiber concrete composite members 14; Adjacent first longitudinal reinforcing bars 6 are connected into an integral structure by connecting bars 10, and adjacent grid reinforcement members 5 are connected by second longitudinal reinforcing bars 6a to elevate the structure of the assembled composite bridge deck structure with grid joints strength. Preferably, transverse reinforcing bars spanning the first longitudinal reinforcing bars 6 and the second longitudinal reinforcing bars 6a are evenly distributed in the docking area. The space is fixed by welding or steel wire binding.

In a specific embodiment, the lattice structure includes longitudinal steel bars 52 and transverse steel bars 51 that are cross-connected to each other; both the longitudinal steel bars 52 and the transverse steel bars 51 It is composed of unequal-length steel plates with holes or without holes or angle steel or thick steel bars. The horizontal bridge steel rod 51 is fixed above the longitudinal bridge steel rod 52 or the horizontal bridge steel rod 51 is installed on the longitudinal bridge. on the steel rod 52; when the steel rod 51 of the horizontal bridge is installed on the steel rod 52 of the longitudinal bridge, the steel rod 51 of the horizontal bridge and the steel rod 52 of the longitudinal bridge are fixedly connected by welding together. In a specific embodiment, the fiber concrete layer 2 is easy to wear during use. For this reason, the top of the fiber concrete layer 2 is covered with a wear layer 8, and the wear layer 8 is used to replace the fiber concrete layer 2 for wear, and the belt grid is extended. The service life of the assembled composite bridge deck structure with joints.

In a specific embodiment, in order to enhance the adhesion between the steel bridge deck 13 and the fiber concrete layer 2, a shear structure is provided at the joint surface of the steel bridge deck 1 and the fiber concrete layer 2, and the shear structure can be Commonly used shear nails 12 are used.

In a specific embodiment, the prefabricated fiber concrete part 4 and the cast-in-place fiber concrete part 3 are mainly cast from one or several types of ultra-high performance concrete such as reactive powder concrete, ultra-high performance fiber reinforced concrete, and grouted fiber concrete. . Among them, ultra-high-performance concrete specifically refers to ultra-high-performance concrete with a bending tensile strength of more than 25 MPa and a compressive strength of more than 130 MPa.

In the technical solution of the utility model, materials such as the aforementioned active powder concrete, ultra-high-performance fiber-reinforced concrete, or grouted fiber concrete can be used. These preferred special concrete can not only ensure compactness, but also help improve the durability of the steel bridge deck 13. And the thinner bridge deck structure layer can meet the design requirements of tensile strength, and the weight of the dead load of the combined deck structure will not be significantly increased as a whole.

The above-mentioned assembled composite deck structure with grid joints has the advantages of small building height, high rigidity, good bonding performance between composite layers, good durability, good fatigue resistance, and small impact of vehicles. The entire fabricated steel-fiber concrete composite bridge deck structure is jointly stressed by the fiber concrete layer 2 and the steel bridge deck layer 1 . Because the concrete tensile strength at the joints of the existing assembled steel-fiber concrete composite bridge deck structure is very low, under the action of temperature changes and repeated impacts of vehicles, transverse cracks are more likely to occur at the joints, while the grid reinforcement of the utility model Member 5 greatly improves the local strength and stiffness of the joints of the bridge deck structure, and greatly reduces the stress level at the joints; It greatly enhances the anti-interlayer slipping ability between the fiber concrete and the steel bridge deck 13 at the joint, and has a "reinforcing" effect on the fiber concrete, which improves the tensile strength of the joint and can effectively overcome the possible lateral crack problem.

The construction of fiber concrete layer 2 can adopt the prefabricated construction method combining cast-in-place and prefabrication. Since the continuity of fiber concrete is artificially broken at the joint surface where the cast-in-place and prefabricated parts are combined, the tensile strength of the joint surface is The strength becomes very weak. In order to effectively connect these two parts and prevent cracking due to excessive stress in the docking area, the utility model adopts a construction method in which a grid reinforcement member 5 is added in the docking area. Due to the steel elastic modulus It is much larger than the elastic modulus of fiber concrete, thereby increasing the tensile strength and stiffness at the weak joint surface and reducing the stress level at the joint; The overall tensile capacity of the fiber concrete at the joint is improved, and the interlayer slip resistance between the fiber concrete and the steel bridge deck 13 at the joint is enhanced, and the fiber concrete has a "reinforcing" effect, which improves the resistance of the joint. tensile strength. In addition, the tensile strength of the fiber concrete layer 2 in the docking area is also improved by docking the longitudinal reinforcing steel bars configured in the cast-in-place and prefabricated parts with the longitudinal bridge steel rods 52 in the grid reinforcement member 5 .

Compared with the prior art, the utility model has the advantages of:

1. The assembled steel-fiber concrete composite bridge deck structure of the present utility model is a composite bridge deck structure that can be effectively applied to the assembled construction method. The composite bridge deck structure of the present utility model fully utilizes the advantages of the assembled bridge construction method. Advantages, not only can effectively shorten the construction period, reduce production costs, improve project quality, but also reduce the possible adverse effects of the construction environment, the installation of components is simple, and the construction is convenient.

2. The prefabricated steel-fiber concrete composite bridge deck structure of the present utility model is mainly jointly stressed by the fiber concrete layer 2 and the steel bridge deck layer 1, and the prefabricated construction method can be adopted. The composite bridge deck structure of the present utility model is particularly adopted A grid reinforcement member 5 is provided, and the grid reinforcement member 5 particularly includes vertical and horizontal bridge steel rods 51. This special structural design reduces the stress of the steel bridge deck 13 at the joint position and its vertical and horizontal ribs under the wheel load of the vehicle. Stress greatly enhances the anti-slip ability between the fiber concrete and the steel bridge deck 13 at the joint, and has the effect of "reinforcement" and "cuffing" on the fiber concrete, greatly reducing the fiber concrete joint 11 Risk of cracking.

In general, the utility model makes full use of the advantages of the prefabricated construction technology by arranging the grid reinforcement member 5 in the prefabricated steel-fiber concrete composite bridge deck structure (especially the orthotropic steel bridge deck 13 composite structure). , Effectively play out, which not only facilitates the construction operation, provides construction efficiency, but also is more conducive to ensuring the construction quality of the composite bridge deck structure. Judging from the actual application effect, the composite bridge deck structure of the present invention does not change the overall thickness of the bridge deck structure, and greatly enhances the interlayer slip resistance between the fiber concrete and the steel bridge deck 13 at the joint, and has a good effect on the fiber concrete It has the functions of "reinforcing" and "cuffing", which can effectively improve the local strength and stiffness of the composite bridge deck structure, reduce the stress level at the joints, and effectively prevent the occurrence of cracks at the joints. It has great practical value and good economic benefits, especially has broad application prospects in the construction of large and extra large steel bridges.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present utility model.

Claims (7)

1. the assembled combined bridge deck structure with grating type joint, described combined bridge deck structure includes at least two block plates-fiber concrete combination type component and is assembled；Described steel plate-fiber concrete combination type component includes the steel bridge deck being positioned at bottom and the prefibers concrete element built on steel bridge deck；It is characterized in that: the docking region of adjacent two blocks of described steel plates-fiber concrete combination type component is provided with grating type joint；Described grating type joint includes cast-in-place fiber concrete part and the grid stiffener being consolidated on steel bridge deck；Described grid stiffener is coated with the cast-in-place fiber concrete part being positioned at described docking region completely by the prefibers concrete element being arranged in both sides, described docking region, and described prefibers concrete element and cast-in-place fiber concrete part connect and compose the fiber concrete layer of entirety by described grid stiffener；Two pieces of adjacent described steel bridge decks connect the fixing steel bridge deck layer forming entirety；At least one end, the two ends of every piece of steel bridge deck is connected with a grid stiffener, described grid stiffener is connected with the prefibers concrete element in steel plate-fiber concrete combination type component along the side that bridge is longitudinal in build-in mode, and described grid stiffener is connected with described cast-in-place fiber concrete part along the opposite side that bridge is longitudinal in build-in mode.

2. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that: the fiber concrete seam of described prefibers concrete element and described cast-in-place fiber concrete part is arranged on the top of described grid stiffener.

3. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterized in that: being configured with in described steel plate-fiber concrete combination type component along bridge longitudinal extension and run through first longitudinal reinforcing steel bar of described steel bridge deck and be connected to the longitudinal reinforcing steel bar of second between grid stiffener, the docking region of adjacent two blocks of described steel plates-fiber concrete combination type component is provided with connection reinforcing bar；By connecting steel reinforcement abutting joints connection between described first longitudinal reinforcing steel bar.

4. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that: described gridiron structure includes intersecting the vertical bridge that connects to steel rod elements and direction across bridge steel rod elements；Described direction across bridge steel rod elements be installed in described vertical bridge above steel rod elements or described direction across bridge steel rod elements be located in described vertical bridge on steel rod elements and described direction across bridge steel rod elements and vertical bridge be connected to steel rod elements is fixing.

5. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that: the top of described fiber concrete layer is covered with wearing course.

6. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that: the faying face place of described steel bridge deck layer and described fiber concrete layer is provided with shear structure.

7. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that the external coating of described steel bridge deck and grid stiffener has preservative.